When Apple introduced the iPad mini, they spent quite a bit of time comparing it to the Google Nexus 7, especially when it came to the merits of the iPad mini's 4:3, 7.9-inch screen over the 16:10, 7-inch screen of the Nexus 7. Physical screen size is only one factor, however. There's also screen resolution to consider, something Apple often touts with their Retina display products like the iPhone 5, iPod touch 5, iPad 4, and MacBook Pro. But not the iPad mini. So, when we put everything on the table, how well does the iPad mini stack up not only to the Nexus 7, but the similarly screened Amazon Kindle Fire HD?